Vacancy-Catalyzed Cation Homogenization for High-Performance AgBiS2 Nanocrystal Solar Cells

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-04-02 DOI:10.1021/acsenergylett.5c0050610.1021/acsenergylett.5c00506

Yang Liu, Zitao Ni, Lucheng Peng, Hao Wu, Zeke Liu, Yongjie Wang*, Wanli Ma and Gerasimos Konstantatos*,

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Abstract

Environmentally friendly silver bismuth sulfide (AgBiS₂) nanocrystals (NCs) are promising solution-processed absorbers for photovoltaic applications. Cation disorder nonhomogeneity has been considered as a prevalent obstacle, significantly impacting the optoelectronic properties of AgBiS₂ films. In this work, we developed a vacancy-assisted strategy to mitigate the energy barriers for the cation homogenization process in AgBiS₂ NC films. Chloride ions are introduced to induce surface vacancies, leading to improved cation homogeneity and enhanced absorption under low-temperature annealing. The resultant AgBiS₂ NC solar cells exhibited a power conversion efficiency (PCE) over 10%, the highest to date from a solid-state ligand-exchange method. Our strategy not only enables high-quality AgBiS₂ NC films but also provides an approach for engineering cation disorder in multinary materials.

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空位催化阳离子均匀化制备高性能AgBiS2纳米晶太阳能电池

环保型硫化银铋（AgBiS2）纳米晶体（NCs）是很有前途的光伏应用溶液加工吸收剂。阳离子无序非均质性一直被认为是一个普遍存在的障碍，严重影响了 AgBiS2 薄膜的光电特性。在这项工作中，我们开发了一种空位辅助策略，以减轻 AgBiS2 NC 薄膜中阳离子均匀化过程的能量障碍。引入氯离子诱导表面空位，从而改善阳离子均匀性，并在低温退火条件下增强吸收。由此产生的 AgBiS2 NC 太阳能电池的功率转换效率 (PCE) 超过了 10%，是迄今为止固态配体交换方法中最高的。我们的策略不仅实现了高质量的 AgBiS2 NC 薄膜，还为二元材料中的阳离子无序工程提供了一种方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.